Option1H - Supply of 74V
Works ok. Problem that at 50V it will not work and that the Led D3 can not be very bright due to power dissipation in 10k resistors
Option1L - Supply of 50V
Does not work due to low voltage after zenner
Option2H - Supply of 74V
Works ok, but if voltage lowers then leds do not behave the same due to different resistors
Option2L - Supply of 50V
does not work, not enough current through resistor VR1, if I reduce VR1 value, then the Zener need to dissipate too much current.
I wanted to send this online to make the PCB and build my first SMD pcb, so power dissipation of components is crucial.
